CN103921203A - Honing method of inner hole of regulating valve of main steam valve of steam turbine - Google Patents
Honing method of inner hole of regulating valve of main steam valve of steam turbine Download PDFInfo
- Publication number
- CN103921203A CN103921203A CN201410155330.8A CN201410155330A CN103921203A CN 103921203 A CN103921203 A CN 103921203A CN 201410155330 A CN201410155330 A CN 201410155330A CN 103921203 A CN103921203 A CN 103921203A
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- CN
- China
- Prior art keywords
- steam turbine
- honing
- control valve
- valve control
- main vaper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/06—Honing machines or devices; Accessories therefor with controlling or gauging equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/08—Honing tools
- B24B33/083—Honing tools with different sets of honing stones
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Control Of Turbines (AREA)
Abstract
The invention belongs to the field of machining, and particularly relates to a honing method of an inner hole of a regulating valve of a main steam valve of a steam turbine. The honing method mainly solves the problem that an inner hole, formed with an existing machining method, of the regulating valve of the main steam valve of the steam turbine is high in roughness. The honing method comprises the following steps that firstly, the regulating valve of the main steam valve of the steam turbine is placed in a heating furnace and heated; secondly, a guide sleeve is assembled in the inner hole of the regulating valve of the main steam valve of the steam turbine in a sleeved mode; thirdly, rough honing oilstone is adopted, honing parameters are adjusted, and rough honing is conducted; fourthly, nitriding is conducted on the roughly-honed regulating valve of the main steam valve of the steam turbine; fifthly, fine honing oilstone is adopted, the honing parameters are adjusted, and fine honing is conducted. According to the honing method, cutting parameters are adjusted reasonably, surface roughness of the honed inner hole reaches Ra (0.025-0.5) microns, precision of the honed inner hole reaches IT6-IT7, and quality is stable and reliable.
Description
Technical field
The invention belongs to field of machining, be specifically related to a kind of honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus.
Background technology
Honing is in fact low speed grinding, be arranged in the fixture on workbench by workpiece, drive honing head to rotate and make axially reciprocating by machine tool chief axis, oilstone on honing head is pressed on surface to be machined with certain pressure (the centrifugal force while rotation including honing head), thereby cut layer of metal as thin as a wafer on workpiece, form and intersect and unduplicated reticulate pattern.
Because Steam Turbine's Main Vaper Valve control valve diameter is large and axial dimension is long, use the surface ratio of existing conventional turning sanding Steam Turbine's Main Vaper Valve control valve endoporus more difficult, after processing, the roughness of endoporus is higher, higher roughness easily makes the motion of Steam Turbine's Main Vaper Valve control valve stuck, causes unit major accident.
Summary of the invention
The object of the invention is the higher problem of roughness in order to solve the Steam Turbine's Main Vaper Valve control valve endoporus that existing processing method obtains, and the honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus is provided.
The honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus of the present invention follows these steps to realize:
One, measure the size of Steam Turbine's Main Vaper Valve control valve endoporus and pilot sleeve external diameter, remove the burr on Steam Turbine's Main Vaper Valve control valve endoporus and pilot sleeve cylindrical, then Steam Turbine's Main Vaper Valve control valve is put into heating furnace and be heated to 180 DEG C～250 DEG C, be incubated blow-on after 3.5～4.5 hours and take out, obtain the Steam Turbine's Main Vaper Valve control valve of heating;
Two, pilot sleeve cover is installed in Steam Turbine's Main Vaper Valve control valve endoporus, naturally cool to room temperature, the Steam Turbine's Main Vaper Valve control valve that obtains assembling;
Three, thick top gem of a girdle-pendant oilstone is installed on the oilstone frame on honing head, the peripheral speed of adjusting honing head is 0.383m/s, reciprocating speed is 0.167m/s, resultant cutting speed with the angles of the crossing of 45 ° and 0.417m/s is carried out rough honing to the Steam Turbine's Main Vaper Valve control valve endoporus assembling, honing is to Ra0.8～0.9 of Steam Turbine's Main Vaper Valve control valve endoporus, when honing, constantly drip honing cutting fluid, obtain the Steam Turbine's Main Vaper Valve control valve of corase grind;
Four, the Steam Turbine's Main Vaper Valve control valve of corase grind is carried out to nitriding processing, obtain the Steam Turbine's Main Vaper Valve control valve after nitriding;
Five, on the oilstone frame smart top gem of a girdle-pendant oilstone being changed the outfit on honing head, the peripheral speed of adjusting honing head is 0.433m/s, reciprocating speed is 0.183m/s, Steam Turbine's Main Vaper Valve control valve endoporus with the resultant cutting speed of the angles of the crossing of 45 ° and 0.467m/s after to nitriding carries out microhoning, when honing, constantly drip honing cutting fluid, complete the honing processing of Steam Turbine's Main Vaper Valve control valve endoporus.
The honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus of the present invention is rationally adjusted cutting parameter, making the surface roughness of Steam Turbine's Main Vaper Valve control valve endoporus reach Ra(0.025-0.5) μ m, precision reach IT6-IT7, steady quality is reliable simultaneously, reaches ripe technique level.
Brief description of the drawings
Fig. 1 is the structural representation of the Steam Turbine's Main Vaper Valve control valve that assembles of the present invention, 1-Steam Turbine's Main Vaper Valve control valve, 2-pilot sleeve.
Detailed description of the invention
Detailed description of the invention one: the honing processing method of present embodiment Steam Turbine's Main Vaper Valve control valve endoporus follows these steps to implement:
One, measure the size of Steam Turbine's Main Vaper Valve control valve endoporus and pilot sleeve external diameter, remove the burr on Steam Turbine's Main Vaper Valve control valve endoporus and pilot sleeve cylindrical, then Steam Turbine's Main Vaper Valve control valve is put into heating furnace and be heated to 180 DEG C～250 DEG C, be incubated blow-on after 3.5～4.5 hours and take out, obtain the Steam Turbine's Main Vaper Valve control valve of heating;
Two, pilot sleeve cover is installed in Steam Turbine's Main Vaper Valve control valve endoporus, naturally cool to room temperature, the Steam Turbine's Main Vaper Valve control valve that obtains assembling;
Three, thick top gem of a girdle-pendant oilstone is installed on the oilstone frame on honing head, the peripheral speed of adjusting honing head is 0.383m/s, reciprocating speed is 0.167m/s, resultant cutting speed with the angles of the crossing of 45 ° and 0.417m/s is carried out rough honing to the Steam Turbine's Main Vaper Valve control valve endoporus assembling, honing is to Ra0.8～0.9 of Steam Turbine's Main Vaper Valve control valve endoporus, when honing, constantly drip honing cutting fluid, obtain the Steam Turbine's Main Vaper Valve control valve of corase grind;
Four, the Steam Turbine's Main Vaper Valve control valve of corase grind is carried out to nitriding processing, obtain the Steam Turbine's Main Vaper Valve control valve after nitriding;
Five, on the oilstone frame smart top gem of a girdle-pendant oilstone being changed the outfit on honing head, the peripheral speed of adjusting honing head is 0.433m/s, reciprocating speed is 0.183m/s, Steam Turbine's Main Vaper Valve control valve endoporus with the resultant cutting speed of the angles of the crossing of 45 ° and 0.467m/s after to nitriding carries out microhoning, when honing, constantly drip honing cutting fluid, complete the honing processing of Steam Turbine's Main Vaper Valve control valve endoporus.
Between present embodiment honing head and machine tool chief axis, float, or claim universal joint to connect, object is to reduce the impact on honing precision with the spindle rotation error causing because of coaxiality error of workpiece hole.In honing, oilstone must keep the overlap joint of certain length, to ensure the linearity of honing bores.For overlapping curve is not repeated, improve the circularity in hole, an additional corner must make honing head often circle time.In addition, within each reciprocating stroke time, the revolution of honing head is non-integer, makes between twice stroke the relative workpiece of honing head at the certain angle that circumferentially staggers again.After honing, the finished surface of Steam Turbine's Main Vaper Valve control valve endoporus is without burn, crackle, almost without metamorphic layer.Make geometrical precision, the dimensional accuracy in hole improve one-level.
Detailed description of the invention two: the Steam Turbine's Main Vaper Valve control valve described in step 1 that what present embodiment was different from detailed description of the invention one is and the material of pilot sleeve are 38CrMoAl.Other step and parameter are identical with detailed description of the invention one.
Detailed description of the invention three: what present embodiment was different from detailed description of the invention one or two is that the nitration case thickness that step 4 nitriding processing obtains is 0.3～0.5mm.Other step and parameter are identical with detailed description of the invention one or two.
The case hardness HV of the Steam Turbine's Main Vaper Valve control valve after present embodiment nitriding is not less than 650, and fragility is not more than 3 grades.
Detailed description of the invention four: the thick top gem of a girdle-pendant oilstone described in step 3 that what present embodiment was different from one of detailed description of the invention one to three is is to use oilstone adhesive to paste on oilstone frame, smart top gem of a girdle-pendant oilstone described in step 5 is also to use oilstone adhesive to paste on oilstone frame, the plug Luo that wherein oilstone adhesive is 22% by mass percent, 3% rosin and 75% acetone composition.Other step and parameter are identical with one of detailed description of the invention one to three.
Detailed description of the invention five: it is the aluminum oxide honing stone of 80#～180# that the thick top gem of a girdle-pendant oilstone described in step 3 that what present embodiment was different from one of detailed description of the invention one to four is is selected granularity.Other step and parameter are identical with one of detailed description of the invention one to four.
Detailed description of the invention six: it is the aluminum oxide honing stone of 280#～W20 that the smart top gem of a girdle-pendant oilstone described in step 5 that what present embodiment was different from one of detailed description of the invention one to five is is selected granularity.Other step and parameter are identical with one of detailed description of the invention one to five.
Detailed description of the invention seven: what present embodiment was different from one of detailed description of the invention one to six is that the honing cutting fluid described in step 3 and step 5 all adopts kerosene.Other step and parameter are identical with one of detailed description of the invention one to six.
Embodiment mono-: the honing processing method of the present embodiment Steam Turbine's Main Vaper Valve control valve endoporus follows these steps to implement:
One, measure the size of Steam Turbine's Main Vaper Valve control valve endoporus and pilot sleeve external diameter, remove the burr on Steam Turbine's Main Vaper Valve control valve endoporus and pilot sleeve cylindrical, then Steam Turbine's Main Vaper Valve control valve is put into heating furnace and be heated to 220 DEG C, be incubated blow-on after 4 hours and take out, obtain the Steam Turbine's Main Vaper Valve control valve of heating;
Two, pilot sleeve cover is installed in Steam Turbine's Main Vaper Valve control valve endoporus, naturally cool to room temperature, the Steam Turbine's Main Vaper Valve control valve that obtains assembling;
Three, 80# aluminum oxide honing stone is installed on the oilstone frame on honing head, the peripheral speed of adjusting honing head is 0.383m/s, reciprocating speed is 0.167m/s, resultant cutting speed with the angles of the crossing of 45 ° and 0.417m/s is carried out rough honing to the Steam Turbine's Main Vaper Valve control valve endoporus assembling, honing is to the Ra0.8 of Steam Turbine's Main Vaper Valve control valve endoporus, when honing, constantly drip honing cutting fluid, obtain the Steam Turbine's Main Vaper Valve control valve of corase grind;
Four, the Steam Turbine's Main Vaper Valve control valve of corase grind is carried out to nitriding processing, obtain the Steam Turbine's Main Vaper Valve control valve after nitriding;
Five, on oilstone frame W20 aluminum oxide honing stone being changed the outfit on honing head, the peripheral speed of adjusting honing head is 0.433m/s, reciprocating speed is 0.183m/s, Steam Turbine's Main Vaper Valve control valve endoporus with the resultant cutting speed of the angles of the crossing of 45 ° and 0.467m/s after to nitriding carries out microhoning, when honing, constantly drip honing cutting fluid, complete the honing processing of Steam Turbine's Main Vaper Valve control valve endoporus.
The model of the present embodiment oilstone used is SF25*350.
The material of the present embodiment Steam Turbine's Main Vaper Valve control valve and pilot sleeve is 38CrMoAl, and the inner diameter d of pilot sleeve is 194.95mm, and the degree of depth m that pilot sleeve cover installs to Steam Turbine's Main Vaper Valve control valve is 300mm, and the overall length of Steam Turbine's Main Vaper Valve control valve is 810mm.
Adopting the honing technique of this enforcement to make the surface roughness of Steam Turbine's Main Vaper Valve control valve endoporus reach Ra(0.025-0.8) μ m, precision reach IT6-IT7, meet the technical requirement of pattern completely, and steady quality is reliable, reaches ripe technique level.
Claims (7)
1. the honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus, it is characterized in that following these steps to realizing:
One, measure the size of Steam Turbine's Main Vaper Valve control valve endoporus and pilot sleeve external diameter, remove the burr on Steam Turbine's Main Vaper Valve control valve endoporus and pilot sleeve cylindrical, then Steam Turbine's Main Vaper Valve control valve is put into heating furnace and be heated to 180 DEG C～250 DEG C, be incubated blow-on after 3.5～4.5 hours and take out, obtain the Steam Turbine's Main Vaper Valve control valve of heating;
Two, pilot sleeve cover is installed in Steam Turbine's Main Vaper Valve control valve endoporus, naturally cool to room temperature, the Steam Turbine's Main Vaper Valve control valve that obtains assembling;
Three, thick top gem of a girdle-pendant oilstone is installed on the oilstone frame on honing head, the peripheral speed of adjusting honing head is 0.383m/s, reciprocating speed is 0.167m/s, resultant cutting speed with the angles of the crossing of 45 ° and 0.417m/s is carried out rough honing to the Steam Turbine's Main Vaper Valve control valve endoporus assembling, honing is to Ra0.8～0.9 of Steam Turbine's Main Vaper Valve control valve endoporus, when honing, constantly drip honing cutting fluid, obtain the Steam Turbine's Main Vaper Valve control valve of corase grind;
Four, the Steam Turbine's Main Vaper Valve control valve of corase grind is carried out to nitriding processing, obtain the Steam Turbine's Main Vaper Valve control valve after nitriding;
Five, on the oilstone frame smart top gem of a girdle-pendant oilstone being changed the outfit on honing head, the peripheral speed of adjusting honing head is 0.433m/s, reciprocating speed is 0.183m/s, Steam Turbine's Main Vaper Valve control valve endoporus with the resultant cutting speed of the angles of the crossing of 45 ° and 0.467m/s after to nitriding carries out microhoning, when honing, constantly drip honing cutting fluid, complete the honing processing of Steam Turbine's Main Vaper Valve control valve endoporus.
2. the honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus according to claim 1, is characterized in that Steam Turbine's Main Vaper Valve control valve described in step 1 and the material of pilot sleeve are 38CrMoAl.
3. the honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus according to claim 1, is characterized in that the nitration case thickness that step 4 nitriding processing obtains is 0.3～0.5mm.
4. the honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus according to claim 1, it is characterized in that the thick top gem of a girdle-pendant oilstone described in step 3 is to use oilstone adhesive to paste on oilstone frame, smart top gem of a girdle-pendant oilstone described in step 5 is also to use oilstone adhesive to paste on oilstone frame, the plug Luo that wherein oilstone adhesive is 22% by mass percent, 3% rosin and 75% acetone composition.
5. the honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus according to claim 1, is characterized in that it is the aluminum oxide honing stone of 80#～180# that thick top gem of a girdle-pendant oilstone described in step 3 is selected granularity.
6. the honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus according to claim 1, is characterized in that it is the aluminum oxide honing stone of 280#～W20 that smart top gem of a girdle-pendant oilstone described in step 5 is selected granularity.
7. the honing processing method of Steam Turbine's Main Vaper Valve control valve endoporus according to claim 1, is characterized in that the honing cutting fluid described in step 3 and step 5 all adopts kerosene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410155330.8A CN103921203B (en) | 2014-04-17 | 2014-04-17 | The Honing process method of Steam Turbine's Main Vaper Valve control valve endoporus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410155330.8A CN103921203B (en) | 2014-04-17 | 2014-04-17 | The Honing process method of Steam Turbine's Main Vaper Valve control valve endoporus |
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| CN103921203B CN103921203B (en) | 2016-04-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105643206A (en) * | 2015-12-11 | 2016-06-08 | 长春航空液压控制有限公司 | Processing method for inner hole of ultra-precise valve sleeve |
| CN110695837A (en) * | 2019-10-18 | 2020-01-17 | 苏州航发航空零部件有限公司 | Honing method for inner hole reticulate pattern of actuator cylinder of aircraft engine |
| CN112743442A (en) * | 2020-12-30 | 2021-05-04 | 中航动力株洲航空零部件制造有限公司 | Honing method for carburizing hole of tappet guide sleeve of aero-engine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058363A (en) * | 1990-07-24 | 1992-02-05 | 任鸿庆 | Cooling thrinkage regeneration technology for waste cylinder sleeve of suction pump in oil field |
| JP2008221445A (en) * | 2007-03-15 | 2008-09-25 | Toyota Motor Corp | Method for machining sprayed coating |
| CN201604070U (en) * | 2009-12-17 | 2010-10-13 | 宝鸡忠诚机床股份有限公司 | Numerical control vertical type cylinder sleeve honing mill |
| JP2012045642A (en) * | 2010-08-24 | 2012-03-08 | Nisshin Seisakusho:Kk | Bore surface machining method, tool for machining bore surface, and bore surface machining device |
| CN102371539A (en) * | 2010-08-08 | 2012-03-14 | 韦星野 | Rounding method for boning boned emery sticks |
| CN203197723U (en) * | 2013-04-01 | 2013-09-18 | 扬州五亭桥缸套有限公司 | Cylindrical workpiece inner hole polishing device |
| CN103691760A (en) * | 2013-12-17 | 2014-04-02 | 上海奉贤钢管厂 | Preparation process of stainless steel tube |
-
2014
- 2014-04-17 CN CN201410155330.8A patent/CN103921203B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058363A (en) * | 1990-07-24 | 1992-02-05 | 任鸿庆 | Cooling thrinkage regeneration technology for waste cylinder sleeve of suction pump in oil field |
| JP2008221445A (en) * | 2007-03-15 | 2008-09-25 | Toyota Motor Corp | Method for machining sprayed coating |
| CN201604070U (en) * | 2009-12-17 | 2010-10-13 | 宝鸡忠诚机床股份有限公司 | Numerical control vertical type cylinder sleeve honing mill |
| CN102371539A (en) * | 2010-08-08 | 2012-03-14 | 韦星野 | Rounding method for boning boned emery sticks |
| JP2012045642A (en) * | 2010-08-24 | 2012-03-08 | Nisshin Seisakusho:Kk | Bore surface machining method, tool for machining bore surface, and bore surface machining device |
| CN203197723U (en) * | 2013-04-01 | 2013-09-18 | 扬州五亭桥缸套有限公司 | Cylindrical workpiece inner hole polishing device |
| CN103691760A (en) * | 2013-12-17 | 2014-04-02 | 上海奉贤钢管厂 | Preparation process of stainless steel tube |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105643206A (en) * | 2015-12-11 | 2016-06-08 | 长春航空液压控制有限公司 | Processing method for inner hole of ultra-precise valve sleeve |
| CN110695837A (en) * | 2019-10-18 | 2020-01-17 | 苏州航发航空零部件有限公司 | Honing method for inner hole reticulate pattern of actuator cylinder of aircraft engine |
| CN112743442A (en) * | 2020-12-30 | 2021-05-04 | 中航动力株洲航空零部件制造有限公司 | Honing method for carburizing hole of tappet guide sleeve of aero-engine |
| CN112743442B (en) * | 2020-12-30 | 2022-05-06 | 中航动力株洲航空零部件制造有限公司 | Honing method for carburizing hole of tappet guide sleeve of aero-engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103921203B (en) | 2016-04-13 |
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